Added Basic Auth in track SDK

Author: amarjaiswal007

README.md

@@ -7,11 +7,19 @@ Install `interakt-track-python` using pip
 
     pip install interakt-track-python
 
+## Authentication
 Inside your app, you’ll want to **set your** `write_key` before making any track calls:
+```
+import track
+
+track.write_key =  "YOUR_WRITE_KEY"
+```
+Interakt Track APIs uses HTTP Basic Auth, which involves a `‘username:password’` that is **base64 encoded** and prepended with the string `‘Basic ‘`. 
+
+Your **write_key** is your `username` and `password` is empty. Which means if your **write_key** is `'abcd123'`,  a colon is added to it, and then the password field is left empty. 
+
+After base64 encoding `'abcd123:'` becomes `'YWJjZDEyMzo='`; and this is passed in the authorization header like so: `'Authorization: Basic YWJjZDEyMzo='`
 
-    import track
-    
-    track.write_key =  "YOUR_WRITE_KEY"
 
 
 ## Development Settings
@@ -85,4 +93,4 @@ The `event` call has the following fields:
 |--|--|--|
 |user_id|str or int|The ID for the user in your database.|
 |event|str|Name of the event you want to track, For eg: "Product Added".|
-|traits|dict|dictionary of properties for the event. If the event was **Product Added**, it might have properties like `price` or `product_name`|
+|traits|dict|dictionary of properties for the event. If the event was **Product Added**, it might have properties like `price` or `product_name`.|

track/request.py

@@ -13,15 +13,15 @@
 
 def post(write_key, host=None, path=None, body=None, timeout=10):
     """Post the msg to the API"""
+    auth = HTTPBasicAuth(username=write_key, password="")
     headers = {
         'Content-Type': 'application/json',
-        'User-Agent': f'interakt-track-python/{VERSION}',
-        'Authorization': write_key
+        'User-Agent': f'interakt-track-python/{VERSION}'
     }
     url = remove_trailing_slash(host or DEFAULT_HOST) + path
     logger.debug(f'Making request: {body}')
     response = _session.post(url=url, headers=headers,
-                             json=body, timeout=timeout)
+                             auth=auth, json=body, timeout=timeout)
     if response.status_code == 200:
         logger.debug("Data uploaded successfully")
         return response